The Madagascar 3 actress denied reports that the couple are close to splitting up, insisting that their relationship is as solid as ever.
"It seems like that happens at least once a year, or at least once every two years," Pinkett Smith explained in an interview with Essence.
"It's rumoured that we're getting a divorce. But no. We're not getting a divorce. Where am I gonna go? Where am I going to go? That's my boo. It's like he's another part of me."
Asked why she believes her marriage in particular has been subject to such rumours, the 40-year-old said: "Every year, one celebrity couple is under the microscope. This year, unluckily, it's us! I almost want to say that we should have been expecting it."
The couple will celebrate their 15th wedding anniversary on December 31. They are parents to two children, Jaden and Willow.